feat: add users and groups API routes

src-ui/src/app/data/paperless-group.ts

@@ -0,0 +1,9 @@
+import { ObjectWithId } from './object-with-id'
+
+export interface PaperlessGroup extends ObjectWithId {
+  name?: string
+
+  user_count?: number // not implemented yet
+
+  permissions?: string[]
+}

src-ui/src/app/data/paperless-user.ts

@@ -0,0 +1,15 @@
+import { PaperlessGroup } from 'src/app/data/paperless-group'
+import { ObjectWithId } from './object-with-id'
+
+export interface PaperlessUser extends ObjectWithId {
+  username?: string
+  first_name?: string
+  last_name?: string
+  date_joined?: Date
+  is_staff?: boolean
+  is_active?: boolean
+  is_superuser?: boolean
+  groups?: PaperlessGroup[]
+  permissions?: string[]
+  inherited_permissions?: string[]
+}